S2 breathing really heavily
06-02-2011, 03:01 PM
#1
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S2 breathing really heavily
as most people who were folowin my other thread will know im havin problems with my s2,its breathing very heavily.
i replaced head gasket, cleaned all pipes through, replaced breather on corner of rocker cover aswell.but its still breathing heavy and smokes.
my compression is 155psi in each cylinder so surely its definitely not rings???
ive tried a few different turbos with all the same results.
i drove up the road the other day and the pressure blew the little oil breather apart on the corner of rocker cover!!!!
does anyone think it could b a cracked head??
im running out of ideas, i did not have the head pressure tested when i did headgasket so does anyone think its possible this could be the cause?
oil was filling up in my intercooler aswell, ive now blocked off that breather to metering unit, and ran the pipe to atmosphere.
ive ran out of ideas now ,anyone think it could be the head?
i replaced head gasket, cleaned all pipes through, replaced breather on corner of rocker cover aswell.but its still breathing heavy and smokes.
my compression is 155psi in each cylinder so surely its definitely not rings???
ive tried a few different turbos with all the same results.
i drove up the road the other day and the pressure blew the little oil breather apart on the corner of rocker cover!!!!
does anyone think it could b a cracked head??
im running out of ideas, i did not have the head pressure tested when i did headgasket so does anyone think its possible this could be the cause?
oil was filling up in my intercooler aswell, ive now blocked off that breather to metering unit, and ran the pipe to atmosphere.
ive ran out of ideas now ,anyone think it could be the head?
06-02-2011, 03:51 PM
#2
If there really is that much pressure and all breathers are clear it must be rings surely? I know the compression test shows good but where is all that pressure coming from then? 
If the head was cracked I cant see why it wouldnt cause high crank case pressure.
If the head was cracked I cant see why it wouldnt cause high crank case pressure.
06-02-2011, 04:30 PM
#4
It's a tricky one mate, you've done everything else and I cant see how a cracked head would pressurise the bottom end so to me it looks that way yes.
Unless you have some how plumbed the breathers wrong and boost pressure is being piped into the sump? Maybe the little one way valve has failed?
Unless you have some how plumbed the breathers wrong and boost pressure is being piped into the sump? Maybe the little one way valve has failed?
Last edited by Karlos G; 06-02-2011 at 04:32 PM.
06-02-2011, 05:50 PM
#5
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how are the breathers plummed in dude,have you actuall checked to see if the rocker cover is blocked
and the breather that goes to the block ive seem be almost blocked
and the breather that goes to the block ive seem be almost blocked
07-02-2011, 06:19 AM
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whats a leakdown test rick?
i have the normal breather goin from right corner of rocker cover down to bottom end. the left side of vrocker cover has the normal standard breather and the vacuum thing goin to inlet manifold, and then the original breather that used to go to metering unit goes to atmosphere as ive blocked metering unit off.
karlos: what one way valve do u mean mate? do you mean that small one on the small vacuum pipe that comes off the small breather on left side of rocker cover?
i have the normal breather goin from right corner of rocker cover down to bottom end. the left side of vrocker cover has the normal standard breather and the vacuum thing goin to inlet manifold, and then the original breather that used to go to metering unit goes to atmosphere as ive blocked metering unit off.
karlos: what one way valve do u mean mate? do you mean that small one on the small vacuum pipe that comes off the small breather on left side of rocker cover?
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07-02-2011, 10:14 AM
#11
Mr google says
http://www.type2.com/library/engineg/leaktst.htm
Its fairly straight forward, and as Rick says its really what you should do next to find what your problem is.
Rob,
http://www.type2.com/library/engineg/leaktst.htm
Its fairly straight forward, and as Rick says its really what you should do next to find what your problem is.
Rob,
07-02-2011, 05:51 PM
#14
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yep tried blockin that mate,still the same and still smokin,ive got another rebuilt bottom end but i was just hoping i wouldnt have to swap it all.but i reckon im going to have to,i need to sell the car and no one will pay decent money for it as it
so im going to buy another head and get the other lump built rite up then swap it all over.
so im going to buy another head and get the other lump built rite up then swap it all over.
08-02-2011, 06:19 AM
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it can still have good compression with knackered rings, the compression rings may be ok, but the oil control rings might be cooked, just sounds like the whole engine is tired to me, not much you can do other than to replace it with a decent one. 
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